VOF & Variable Surface Tension in FLUENT

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 March 16, 2009, 12:05 VOF & Variable Surface Tension in FLUENT #1 New Member   Seamus Join Date: Mar 2009 Posts: 1 Rep Power: 0 Hi all, I have been reading through many posts on the forum about the VOF model used in FLUENT and it's capabilities. I am however still slightly confused about one matter: Is it possible to use the VOF model while also incorporating a surface tension that varies with temperature along and interface? If so, how is this accomplished? Perhaps through a UDF or define/phases/interaction...? I would like to model Marangoni or thermocapillary flow as air bubble grows in a liquid silicone oil layer. Any help anybody can offer will be greatly appreciated. P.S. I am using FLUENT 6.2.16 and also have access to 6.3 if necessary!

March 18, 2009, 22:22
#2
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Jane
Join Date: Mar 2009
Posts: 18
Rep Power: 9
Quote:
 Originally Posted by SeamusTCD Hi all, I have been reading through many posts on the forum about the VOF model used in FLUENT and it's capabilities. I am however still slightly confused about one matter: Is it possible to use the VOF model while also incorporating a surface tension that varies with temperature along and interface? If so, how is this accomplished? Perhaps through a UDF or define/phases/interaction...?
i haven't try this before but i thought the UDF able work with the surface tension varies with temperature

 July 5, 2016, 10:00 Through udf #3 New Member   Apiano Morais Join Date: Apr 2016 Posts: 10 Rep Power: 2 This indeed is quite simple and it is posted in the fluent UDF manual. You may modify this /************************************************** ************* Surface Tension Coefficient UDF for the VOF Multiphase Model ************************************************** *************/ #include "udf.h" DEFINE_PROPERTY(sfc, c, t) { real T = C_T(c,t); return 1.35 - 0.004*T + 5.0e-6*T*T; }

 Tags bubble, marangoni, thermocapillary, vof

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